package com.atguigu.gulimall.product.service.impl;

import com.atguigu.common.constant.ProductConstant;
import com.atguigu.gulimall.product.dao.AttrAttrgroupRelationDao;
import com.atguigu.gulimall.product.dao.AttrGroupDao;
import com.atguigu.gulimall.product.dao.CategoryDao;
import com.atguigu.gulimall.product.entity.*;
import com.atguigu.gulimall.product.service.CategoryService;
import com.atguigu.gulimall.product.vo.AttrGroupRelationVo;
import com.atguigu.gulimall.product.vo.AttrRespVo;
import com.atguigu.gulimall.product.vo.AttrVo;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.atguigu.common.utils.PageUtils;
import com.atguigu.common.utils.Query;

import com.atguigu.gulimall.product.dao.AttrDao;
import com.atguigu.gulimall.product.service.AttrService;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.StringUtils;


@Service("attrService")

public class AttrServiceImpl extends ServiceImpl<AttrDao, AttrEntity> implements AttrService {

    @Autowired
    private AttrAttrgroupRelationDao attrAttrgroupRelationDao;

    @Autowired
    private AttrGroupDao attrGroupDao;

    @Autowired
    private CategoryDao categoryDao;

    @Autowired
    private CategoryService categoryService;

    @Autowired
    private AttrDao attrDao;


    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        IPage<AttrEntity> page = this.page(
                new Query<AttrEntity>().getPage(params),
                new QueryWrapper<AttrEntity>()
        );

        return new PageUtils(page);
    }

    /**
     * 保存关联关系
     * @param attr
     */
    @Transactional
    public void saveAttr(AttrVo attr) {
        AttrEntity attrEntity = new AttrEntity();
        BeanUtils.copyProperties(attr, attrEntity);
        //1 保存基本数据
        this.save(attrEntity);

        //2 保存关联关系
        if (attr.getAttrType() == ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode() && attr.getAttrGroupId()!=null) {
            AttrAttrgroupRelationEntity attrAttrgroupRelationEntity = new AttrAttrgroupRelationEntity();
            attrAttrgroupRelationEntity.setAttrGroupId(attr.getAttrGroupId());
            attrAttrgroupRelationEntity.setAttrId(attrEntity.getAttrId());
            attrAttrgroupRelationDao.insert(attrAttrgroupRelationEntity);
        }
    }

    /**
     * 查询vo
     * @param params
     * @param catelogId
     * @param attrType
     * @return
     */
    public PageUtils queryBaseAttrPage(Map<String, Object> params, Long catelogId, String attrType) {
        QueryWrapper<AttrEntity> queryWrapper =
                new QueryWrapper<AttrEntity>().eq("attr_type", "base".equals(attrType) ? ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode() : ProductConstant.AttrEnum.ATTR_TYPE_SALE.getCode());

        //模糊查询
        if (catelogId != 0) {
            queryWrapper.eq("catelog_id", catelogId);
        }
        String key = (String) params.get("key");
        if (!StringUtils.isEmpty(key)) {
            //attr_id  attr_name
            queryWrapper.and((wrapper) -> {
                wrapper.eq("attr_id", key).or().like("attr_name", key);
            });
        }

        IPage<AttrEntity> page = this.page(
                new Query<AttrEntity>().getPage(params),
                queryWrapper
        );

        //封装分页数据
        PageUtils pageUtils = new PageUtils(page);

        //查出新增的属性
        List<AttrEntity> records = page.getRecords();
        List<AttrRespVo> respVos = records.stream().map((attrEntity) -> {
            AttrRespVo attrRespVo = new AttrRespVo();
            //1 vo返回对象多了两个属性CatelogName和AttrGroupName
            BeanUtils.copyProperties(attrEntity, attrRespVo);

            //2 根据catelogId查询CatelogName
            CategoryEntity categoryEntity = categoryDao.selectOne(new QueryWrapper<CategoryEntity>().eq("cat_id", attrEntity.getCatelogId()));
            if (categoryEntity != null) {
                attrRespVo.setCatelogName(categoryEntity.getName());
            }

            //3 多对多关系表根据AttrId查询关系实体，根据关系实体中AttrGroupId查询attrGroupEntity然后设置AttrGroupName
            AttrAttrgroupRelationEntity attrgroupRelationEntity = attrAttrgroupRelationDao.selectOne(new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_id", attrEntity.getAttrId()));
            if (attrgroupRelationEntity != null) {
                AttrGroupEntity attrGroupEntity = attrGroupDao.selectOne(new QueryWrapper<AttrGroupEntity>().eq("attr_group_id", attrgroupRelationEntity.getAttrGroupId()));
                if (attrGroupEntity != null) {
                    attrRespVo.setGroupName(attrGroupEntity.getAttrGroupName());
                }
            }

            return attrRespVo;
        }).collect(Collectors.toList());
        // 把新的数据传送过去
        pageUtils.setList(respVos);
        return pageUtils;
    }

    /**
     * 页面回显数据
     * @param attrId
     * @return
     */
    @Override
    public AttrRespVo getDeatil(Long attrId) {
        AttrRespVo attrRespVo = new AttrRespVo();
        AttrEntity attrEntity = this.getById(attrId);
        BeanUtils.copyProperties(attrEntity, attrRespVo);

        //1 查询分类 分类的完整路径编号catelogPath
        CategoryEntity categoryEntity = categoryDao.selectById(attrEntity.getCatelogId());
        Long[] catelogPath = categoryService.findCatelogPath(attrEntity.getCatelogId());
        if (categoryEntity != null) {
            attrRespVo.setCatelogName(categoryEntity.getName());
        }
        attrRespVo.setCatelogPath(catelogPath);

        if (attrEntity.getAttrType() == ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode()) {
            //2 查询关联
            AttrAttrgroupRelationEntity attrAttrgroupRelationEntity = attrAttrgroupRelationDao.selectOne
                    (new LambdaQueryWrapper<AttrAttrgroupRelationEntity>()
                            .eq(AttrAttrgroupRelationEntity::getAttrId, attrId));
            if (attrAttrgroupRelationEntity != null) {
                attrRespVo.setAttrGroupId(attrAttrgroupRelationEntity.getAttrGroupId());
                //3 根据关联查询分组
                AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attrAttrgroupRelationEntity.getAttrGroupId());
                if (attrGroupEntity != null) {
                    attrRespVo.setGroupName(attrGroupEntity.getAttrGroupName());
                }
            }
        }

        return attrRespVo;
    }

    @Transactional
    public void updateAttr(AttrVo attrvo) {
        AttrEntity attrEntity = new AttrEntity();
        BeanUtils.copyProperties(attrvo, attrEntity);
        //1 修改本身表
        this.updateById(attrEntity);

        Long count = attrAttrgroupRelationDao.selectCount(
                new LambdaQueryWrapper<AttrAttrgroupRelationEntity>()
                        .eq(AttrAttrgroupRelationEntity::getAttrId, attrvo.getAttrId()));

        if (attrEntity.getAttrType() == ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode()) {

            AttrAttrgroupRelationEntity attrAttrgroupRelationEntity = new AttrAttrgroupRelationEntity();
            attrAttrgroupRelationEntity.setAttrId(attrvo.getAttrId());
            attrAttrgroupRelationEntity.setAttrGroupId(attrvo.getAttrGroupId());

            if (count > 0) {
                //2 修改分组关联
                attrAttrgroupRelationDao.update(
                        attrAttrgroupRelationEntity,
                        new LambdaQueryWrapper<AttrAttrgroupRelationEntity>()
                                .eq(AttrAttrgroupRelationEntity::getAttrId, attrvo.getAttrId()));
            } else {
                attrAttrgroupRelationDao.insert(attrAttrgroupRelationEntity);
            }
        }
    }

    /**
     * 根据分组id查询关联属性
     *
     * @param attrgroupId
     * @return
     */
    public List<AttrEntity> getRelationAttr(Long attrgroupId) {
        List<AttrAttrgroupRelationEntity> relationEntities =
                attrAttrgroupRelationDao.selectList(
                        new LambdaQueryWrapper<AttrAttrgroupRelationEntity>()
                                .eq(AttrAttrgroupRelationEntity::getAttrGroupId, attrgroupId));

        List<AttrEntity> attrEntities = relationEntities.stream().map((attrEntity) -> {

            AttrEntity entity = attrDao.selectById(attrEntity.getAttrId());
            return entity;
        }).collect(Collectors.toList());

        return attrEntities;
    }
//    List<Long> collect = relationEntities.stream()
//            .map(AttrAttrgroupRelationEntity::getAttrId).collect(Collectors.toList());
    @Override
    public void deleteRelation(AttrGroupRelationVo[] vos) {

        List<AttrGroupRelationVo> relationVos = Arrays.asList(vos);
        List<AttrAttrgroupRelationEntity> entities = relationVos.stream().map((relationVo) -> {
            AttrAttrgroupRelationEntity relationEntity = new AttrAttrgroupRelationEntity();
            BeanUtils.copyProperties(relationVo, relationEntity);
            return relationEntity;
        }).collect(Collectors.toList());
        //根据attrId，attrGroupId批量删除关联关系
        attrAttrgroupRelationDao.deleteBatchRelation(entities);

    }

    /**
     * 获取当前分组没有关联的所有属性
     *
     * @param params
     * @param attrgroupId
     * @return
     */
    @Override
    public PageUtils getNoRelationAttr(Map<String, Object> params, Long attrgroupId) {
        //1、当前分组只能关联自己所属分类里面的所有属性
        //先查询出当前分组所属的分类
        AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attrgroupId);
        Long catelogId = attrGroupEntity.getCatelogId();

        //2、当前分组只能关联别的分组没有引用的属性
        //2.1当前分类下的所有分组
        List<AttrGroupEntity> attrGroupEntities = attrGroupDao.selectList
                (new QueryWrapper<AttrGroupEntity>().eq("catelog_id", catelogId));
        List<Long> attrGroupIds = attrGroupEntities.stream().map(attrGroupEntity1 -> {
            return attrGroupEntity1.getAttrGroupId();
        }).collect(Collectors.toList());

        //2.2这些分组关联的属性
        List<AttrAttrgroupRelationEntity> relationEntities = attrAttrgroupRelationDao.selectList
                (new QueryWrapper<AttrAttrgroupRelationEntity>().in("attr_group_id", attrGroupIds));
        List<Long> attrIds = relationEntities.stream().map((relationEntity) -> {
            return relationEntity.getAttrId();
        }).collect(Collectors.toList());

        // 从当前分类的所有属性中移除这些属性
        QueryWrapper<AttrEntity> wrapper = new QueryWrapper<AttrEntity>()
                .eq("catelog_id", catelogId)
                .eq("attr_type", ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode());
        if (attrIds != null && attrIds.size() > 0){
            wrapper.notIn("attr_id", attrIds);
        }
        //模糊查询
        String key = (String) params.get("key");
        if (!StringUtils.isEmpty(key)){
            wrapper.and((w)->{
                w.eq("attr_id", key).or().like("attr_name", key);
            });
        }
        IPage<AttrEntity> page = this.page(new Query<AttrEntity>().getPage(params), wrapper);

        return new PageUtils(page);
    }

    /**
     * 可以被检索的规格参数的id集合
     * @param attrIds
     * @return
     */
    public List<Long> selectSearchAttrIds(List<Long> attrIds) {
        List<Long> ids = this.baseMapper.selectSearchAttrIds(attrIds);
        return ids;
    }


}